Rotary steam-engine.



No. 673,956. Patented May I4, 190i.

M. JONSSUN.

ROTARY STEAM ENGINE.

(Application filed Dec. 29, 1900.) (No Model.)

4 Sheets-Sheet l.

1 F Ill m: uomns PETERS ca. Pnm'o'uma. WASHINGYON. n c.

No. $73,956. Patented May l4, l90l. M. JUNSSUN.

ROTARY STEAM ENGINE.

(Application 8106 Dec. 29, 1900.)

4 Sheets--Sh aat 2.

(No Model.)

9 2 a my wl l l.

No. 673,956. Patented May I4, I90]. M. JQNSSON.

ROTARY STEAM ENGINE.

(Application filed. Dec. 29, 1900.)

4 Sheats-Sheet 3.

(No Model.)

m: nonms PETER: co. PHOYO-LIYHO.. wnsumuwn. 0. cu

No. 673,956. Patented May I4, l90l. M. JONSSON.

ROTARY STEAM ENGINE. (Application filed Dec. 29, 1900.) (No Model.) 4Sheets-Sheet 4.

Q7400 WJWM/ 'mE NORRIS PETERS co. PHOTO-HTML) WASHINGTON. n c.

NlTFD STATES Amer OFFICE.

MATHIAS JONSSON, OF WISBY, SWEDEN.

ROTARY STEAM-ENGINE.

SPECIFICATION forming part of Letters Patent No. 673,956, dated May 14,1901. Application filed December 29, 1900. Serial No. 41,510. (Nomodel-J 1b rtZZ whom it may concern.-

Be it known that I, MA'r'HiAs J oNssoN, a subject of the King of Swedenand Norway, residing at l/Visby, in the Kingdom of Sweden, haveinventedcertain new and useful Improvements in Rotary SteamEngines; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, and to figures of reference marked thereon, whichform a part of this specification.

The present invention relates to a rotary steam'engine of the kindconsisting of a rotatably-journaled driving-wheel or drivingdrum injointed connection with a cylindrical part or center piece eccentricallymounted inside the former and rotatably journaled around a tubular valvein which are apertures for admitting steam into and discharging it fromradial steam-cylinders located in the cylindrical center piece andprovided with pistons the connectingrods of which are jointed both tosaid pistons and to the driving-wheel.

The present invention is characterized by several systems of cylindersin the same center piece-one for high-pressure steam and the otherssuccessively for low pressure steamand in which the steam acts accordingto well-known principles. The rate of expansion of the steam in thecylinders can be readily varied, and the direction of rotation canlikewise readily be reversed, the engine consequently being speciallyadapted for the propulsion of boats or vessels. All the operating partsof the engine are well lubricated, the friction being consequentlyreduced to a minimum and a smooth and silent running being procured.

The invention is illustrated in the accompanying drawings.

Figure 1 shows the engine in a vertical section. Fig. 2 shows the enginein a section on line a b of Fig. 1 viewed from the left. Figs. 3 and -tare sections on line d and cf of Fig. 1, respectively, viewed from theleft, the driving-wheel removed. Figs. 5 and 6 are two sections of thedriving-Wheel 7 on lines g .It and i 7c of Fig. 1, respectively,

viewed, respectively, from the right and the left of said figure. Fig. 7shows an end view of the engine. Fig. 8 shows the cylindrical centerpiece 9 viewed from the right of Fig. 1. Fig.9 shows the same piece insectiou'on line Z 1% of Fig. 8 viewed from the left. In the two latterfigures the pistons are removed from the steam-cylinders. Fig. 10 showsa portion of a piston 30 38 on a larger scale and in a central section,together with a horizontal projection of a lubricating-valve 62, lo-'cated in the piston. Figs. 11 to 13 show the tube or pipe 22, in whichis situated the steamad mission passage of the high-pressu re cylinders,said tube being in Figs. 11 and 12 viewed from two opposite sides and inFig. 13 in a longitudinal section on line it 0 of Fig. 11 viewed fromabove. In thelatter view, Fig. 13, is also shown a portion of thesurrounding plug-valve 8. Figs. 14 and 15 show the tube or pipe 4 andthe plug-valve 8, around which the cylindrical center piece isjournaled, viewed as in Fig. 11, in Fig. 14: not in section, and in Fig.15 partially in a longitudinal section. Figs. 16 to 18 are crosssectionsof the plugvalve respectively on lines 19 q of Fig. 14. and

r s and to. of Fig. 15, all these sections being viewed from the left intheir respective figures. Figs. 19 to 23 illustrate the connection ofthe driving-wheel 7 to the center piece 9. Fig. 19 shows thedriving-wheel cover 6 viewed from the left of Fig. 1. Fig. 20 shows thesame cover in section on line as y of Fig. 19 viewed from the left. Fig.21 shows the cylindrical center 9 from the left of Fig. 1; and Fig. 22the same viewed from the right of Fig. 2l-t'. e., viewed as in Fig. 1.Fig. 23 will be explained below.

The frame 1, Fig. l, is provided with two pedestals 2 3. Through onepedestal 2 is carried a pipe 4 and secured there. The outward-pointingend of this pipe 4 is screwed into a valve-chamber 5. The other end ofthe same pipe 4 passes through the cover 6 of the driving-Wheel 7 and isprovided with a tubular plug-valve 8, eccentric to the pipe 4. The pipeetand plugvalve 8 are provided with flanges 66, Figs. 1, 1e, and15,-bearing on each other and held together by screws or the like, sothat they can be readily disengaged. Around the pl ug-valve 8, Fig. 1,is journaled the cylindrical center piece 9, in which is inserted ametal bushing 10, Figs.1 and 9, closely surrounding the plug-valve 8.The latter is provided at one end with a pin 11, Figs. 1, 14, and 15,entering rotatably in a corresponding recess bored out of the center ofthe driving-wheel shaft 12, which is journaled in the pedestal 3,Fig. 1. On the cover 6, Fig. 1, of the driving-wheel 7 is removablyscrewed a tubular hub 13, concentrically surrounding the pipe 4, havingan intermediate space 14 between them, said hub being journaled in thepedestal 2. The hub 13 is adjoined by a surrounding metal bushing 15,inserted into the pedestal 2. The steam-admission pipe 16 anddischarge-pipe 17, Figs. 2 and 7, communicate with the valve-chamber 5.The pipe 17 communicates with the interior of the pipe 4, Fig. 1?I. e.,the space 35. The admission-pipe 16 either communicates with or is shutoff from a transverse passage 18 in a plug-valve l9, rotatably insertedin the valvechamber 5, Figs. 1 and 2, according to the position of saidplug. The plug-valve 19 is provided outside the valve-chamber with ahandle 20, Figs. 1 and 7. The transverse passage 18,'Fig. 1, of the plug19 communicates with the admission-passage 21 of the smaller pipe 22,which is rotatably inserted lengthwise through the pipe 4 and plug-valve8. The inner end of pipe 22 has an enlarged portion 23, Figs. 1, 11, 12,and 13, fitting steamtight and rotatably in the surrounding plugvalve 8.In this enlarged portion the admission-pipe 21 terminateson one side inthe aperture 24. If the handle 20 is situated as posite one of twodiametrally-placed holes 25 in the plug-valve 8, Figs. 1 and 6. Theother hole 25 then communicates with a receiver 26, owing to the recess27, milled out of the enlarged portion 23, Figs. 1, 11, 12, and 13. Onthe other side these holes 25, Figs. 1 and 6, according to the positionof the cylindrical-center piece 9, either are shut off from orcommunicate with the steam-ports 28 of I the three high-pressurecylinders 29, which are located radially in the center piece 9. Thecylinders 29 are provided in the usual manner with pistons 30 andconnecting-rods 31, which latter are jointed to the driving-wheel 7 andpistons 30. The receiver 26, Figs. 1, 11, 12, and 13, is situatedbetween the pipe 22 and the wall of the surrounding plug-valve 8 and isbounded at one end by the enlarged portion 23, above mentioned, and atthe other end by another enlarged portion 32, which likewise fitssteam-tight in the plug 8 and can revolve in it. Opposite the latterenlargement 32 two holes 33 are made diametrally in the plug 8, saidholes by means of lateral recesses 34, milled out of the enlargement'32,being made on one side to communicate one of them with the receiver 26and the other with the chamber 35 in the plug 8 and the pipe 4, Fig. 1.This chamber, as before mentioned,com municates with the steamexhaustpipe 17. On the other side the holes 33, Figs. 1 and 5, according to theposition of the driving-wheel 7, are either shut off from or communicatewith the steam-ports 36 of the three low-pressure cylinders 37. In thelatter there are in the same manner as in the high-pressure cylinders 29located pistons 38, with connecting-rods 39.

The cylindrical piece 9 is jointed to the driving-Wheel 7 by means of anumber of pins 40, Figs. 1, 8, and 19 to 23, located at the end faces ofthe said cylindrical center piece along theircircumference.Thepinsare-alternatively surrounded by rollers and mounted on rings 41,which are removably secured to the center piece. The pitch or distanceapart of the pins is equal to the diameter of one pin, being, moreover,so gaged that such a pin can readily pass through the space between twoothers. The pins 40 at the two end faces of the center piece 9 are solocated in relation to each other that opposite each pin of one ofthe'end faces is a space on the other end face. On the cover 6 of thedriving-wheel 7 and on the end wall opposite are likewise locatedcorresponding pins 67, bearing with their cylindrical surfaces againstthose of the firstmentioned pins. Like the others, the pins 67 aremounted on removable rings 68.

Fig. 23 is a diagram view showing the position of the pins 40 67 on theleft side of the center piece 9 and driving-wheel 7, Fig. 1. In Fig. 23,9 merely denotes the outline of the center piece.

The interior space of the driving-wheel 7 V communicates throughtheinter mediate space shown in Figs. 1 and 7, the aperture 24 is op- 14with an exhaust-passage 42 for the waste steam.

On the outside of the plug-valve 8 are sunk into the latter twoexpansion-valves 43 44, Figs. 1 and 14 to 18, one for each of the holes25, communicating with the high-pressure cylinders 29. The valves 43 44are shaped after the plug 8, so that the surface of the latteris smooth,and are adapted to be shifted longitudinally in their recesses. For thispurpose rods 45 46 are respectively secured to the valves 43 44, one foreach valve, said rods likewise being wholly sunk into the plug 8. Therods 45 46 are located side by side and continued through the pipe 4 andthe wall of the valve-chamber 5. Outside the valve-chamber they areprovided with handles 47 48, respectively, Figs. 1 and 7. In the valves43 44 are made semicircular recesses 49, Figs. 14 and 15, one in eachvalve. When the said valves or slides are pushed into their extremeinner position, Figs. 14 and 16, the recesses 49 will be opposite theholes 25, the latter consequently being uncovered. When the valves orslides are fully withdrawn, Figs. 15 and 17, they will cover aboutone-half of the holes 25.

By means of the adj usting-screw 50, Fig. 1, the valve-chamber 5 can beshifted forward or backward or so that the plug 8 will be properlyadjusted in the center piece 9.

The hub 13, Fig. 1, and the shaft 12 of the driving-wheel are providedwith an ordinary ring lubricator consisting of a Wide ring 51,surrounding the hub 13, so as to bear upon it at its upper side, whileits under side dips into an oil-cellar 52 in the pedestal 2. At theshaft 12 of the driving-Wheel, 53 is the ring and 65 the oil-cellar.

In the wall of the pipe 4 are made a number of oiling-grooves 54, Fig.15, continued in the wall of the plug 8. Some of these oilgrooves 54terminate opposite the holes 25. One of said grooves continues in thedirection of one end of the plug 8, terminating inward in the latter, soas to communicate with a la bricating-passage 55, arranged in the pin11, Figs. 1, 14, and 15.

In the pin 60, Fig. 10, by means of which the hearing or box of eachconnecting-rod is secured to the piston 30 and 38, respectively, islocated a lubricating-passage 61, commencing at the side of the pistonfacing the plug 8 and continuing to the end of the connecting rod 31 and39, respectively, Figs. 1, 5, and 6. In the passage 61, Fig. 10, isinserted a valve 62, jointed to a lever 63, fulcrumed at the middle andactuated by a spring 64, striving to keep the valve closed.

The hub 13, Fig. 1, is provided with a ridge 56, entering in a recess inthe bushing 15 and preventing the oil from spattering out. The saidrecess communicates with the oil-cellar through a passage 57. Theintermediate space 14 communicates with the oil-cellar 58 in thepedestal 2 through a passage 59.

The steam-engine operates and is operated in the following manner: Whenthe position of the handle is that shown in Figs. 1 and 7, steam isadmitted from the supply-pipe 16 to the passage 18, Fig. 2, andcontinues its course through the passage 21, Fig. 1. Ad-

mission of steam to the high-pressure cylinders 29 now follows throughthe aperture 24 and the hole 25 opposite, Figs. 1, 6, and 13, the centerpiece 9 and driving-wheel 7 being consequentlyset in rotation in knownmanner. The pins and 67 consequently will rotate in pairs around eachother. When the drivingwheel7 and center piece 9 have completed onerevolution, the pins 40 will evidently have completed one turn abouteach other. Owing to the fact that the pins 40 each side of the centerpiece 9 are not opposite each other, the driving-wheel and center piecewill be guided in a perfect manner during their rotation. The dischargeof the steam from the highpressure cylinders 29 takes place through theother hole 25, past the recess 27, the steam subsequently flowing intothe receiver 26. Steam admission from the receiver 26 to thelow-pressure cylinders 37 takes place through one of the holes 33,whichcommunicates with the receiver. The steam now has a lower pressure andis further caused to expand in the low-pressure cylinders 37. From thelatter the steam escapes through the other hole and finally exhaustsfrom the engine through the space and discharge-pipe 17,

or it may enter the next receiver, where several systems of low-pressurecylinders are used. When the handle 20 is diametrally re versed, theaperture 24 of the passage 21 is brought into communication with thehole 25 diametrally opposite, so that the steam admission to thehigh-pressure cylinders 29 takes place through the latter, and thedirection of rotation consequent-lyis reversed. The steam admission andexhaust likewise become exchanged for the low-pressure cylinders 37 atthe holes 33. When the handle 20 is rotated through ninety degrees or soas to point straight downward, the steam will be shut ofl from theadmission-pipe 16, and the engine is thus brought to a standstill. Ifthe valve 43, Fig. 15, is pulled out so as to be opposite the hole 25,through which the steam entered in the first place, the steam will beshut off earlier from the passingcylinders 29,a greater rate ofexpansion being thereby the result. The latter expansion device may beused with the engines whether they be provided with low-pressurecylinders or not. By means of the pin 11 the plug 8 obtains a steadysupport during the working of the engine. Through thelubricating-passages 54, Fig. 15, oil is forced in to lubricate the plug8. One of said passages 54 supplies oil to the passage 55 in the pin 11,thus lubricating the latter. When in the course of their rotation thepistons 30 38 arrrive close to the cylinder-bottom, the Valve 62 opens,letting in oil to the connecting-rods from the passages 54. The pistonsthemselves are also supplied with oil from the passages 54. In theoil-cellar 58 all consn med oil collects which accompanies the wastesteam from the driving wheel or drum, as well as the consumed oil fromthe hub 13.

Having described my invention, what I claim isl. A rotary steam-engineprovided with a rotatably-jout-naleddriving-wheel or drivingdrum 7 injointed connection with a cylindrical center piece 9 eccentric-allylocated within said driving-wheel and rotatablyjournaled around atubular plug-valve 8 in which are two diametrally-situated holes 25 foradmitting steam into and discharging it from radial steam-cylinders 29arranged in the aforesaid center piece 9 and provided with pistons 30and connecting-rods 31, in combination with one or more systems oflow-pres sure cylinders 37 arranged in the same center piece 9 as theformer cylinders 29, the highpressurecylinders, and similarly to themand having diametral admission and discharge apertures in the tubularplug-valve 8, for the purpose described.

2. A. rotary steam-engine provided with a rotatably-journaleddriving-wheel or drivingdrum 7 in jointed connection with a cylindricalcenter piece 9 eccentrically located within said driving-wheel androtatably journaled around a tubular plug-valve S, in combination with apipe 4 arranged in such a manner that the pipe 4 and plug-valve 8 bearIIO against each other by means of flanges 66 held together removably byscrews or like means, the plug 8 and pipe being eccentrically situatedin relation to each other, for the purpose described.

- 3. A rotary engine provided with a rotatably-journaled driving-wheelor driving-drum 7 in jointed connection with a cylindrical center piece9 eccentrically located within said driving-wheel and rotatablyjournaledaround a tubular plug-valve 8 which is eccentrically secured to a pipe 4screwed into a valve-chamber 5 and in which plug 8 are located diametralholes for the admission of steam into and.

discharging it from radial high-pressure cylinders 29 in the cylindricalcenter piece 9, in combination with a smaller pipe 22 rotatably insertedin the pipe 4 and the tubular plug 8 and provided at its outer end witha plugvalve or plug 19 entering in the valve-chamber 5 and providedoutside the latter with a handle 20, the transverse passage 18 of saidplug 19 being adapted to communicate on one side with, or to be shut ofifrom, the steamadinission pipe 16 of the engine and on the other side tocommunicate with a steam-admission passage 21 inclosed by the rotatablepipe 22 the inner end of which is provided with an enlarged portion 23fitting closely in the surrounding plug 8 and provided with an aperture24 by means of which the admissionpassage 21 is made to communicate witheither of the holes 25 in the surrounding plug 8 when the rotatable pipeis in acertain definite position, for the purpose described.

4. A rotary engine provided with a rotatably-journaled driving-wheel ordriving-drum 7 in jointed connection with a cylindrical center piece 9eccentrically located within said driving-wheel and rotatably journaledaround a tubular plug-valve 8 which is eccentrically secured to a pipe 4screwed into a valve-chamber 5 and in which plug 8 are located diametralholes for the admission of steam into and discharging it from radialhigh-pressure cylinders 29 and low-pressure cylinders 37 in thecylindrical center piece 9, in combination with a smaller pipe 22rotatably inserted in the pipe 4 and the tubular plug 8 and provided atits outer end with a plug-valve or plug 19 entering in the valvechamber5 and provided outside the latter with a handle 20, the transversepassage 18 of said plug 19 being adapted to communicate on one sidewith, or to be shut off from, the steam-admission pipe 16 of the engineand on the other side to communicate with a steam-admission passage 21inclosed by the rotatable pipe 22 the inner end of which is providedwith an enlarged portion 23 fitting closely in the surrounding plug 8and provided with an aperture 24 by means of which the admission-passage21 is made to communicate with either of the holes 25 in the surroundingplug 8 when the rotatable pipe is in a certain definite position, forthe purpose described.

5. A rotary engine provided with a rotatably-journaled driving-wheel ordriving-drum 7 in jointed connection with a cylindrical center piece 9eccentrically located within said driving-wheel and rotatably journaledaround a tubular plug-valve 8 which is eccentrically secured to a pipe 4screwed into a valve-chamber 5 and in which plug 8 are located diametralholes for the admission of steam into and discharging it from radialhigh-pressure cylinders 29 and low-pressure cylinders 37 in thecylindrical center piece 9, there being rotatably inserted through thepipe 4 and the tubular plug 8a smaller pipe 22 with asteam-admissionpassage 2]. and said rotatable pipe 22 having at its inner end anenlarged portion 23 fitting closely in the surrounding tubular plug 8and containing an aperture 24 adapted to place the admissionpassage 21in communication with either of the diametral holes 25 of the plug 8when the rotatable pipe 22 is given a certain predetermined position, incombination with a re ceiver 26 consisting of the space or chambersituated in the tubular plug 8 outside of the rotatable pipe 22, saidreceiver being bounded at one end by the enlarged portion 23 mentionedabove and at its other end by another enlargement 32 on the rotatablepipe 22 and communicating on one side With those two of the diametralholes 25 and 33 of the plug 8 of which one 25 forms outlet from thehigh-pressure cylinders 29 while the other 33 forms inlet to thelow-pressure cylinders 37, the hole 33 forming outlet from the lattercylinders 37 communicating with the steam-discharge passage 35 of theengine or alternatively with another receiver arranged similarly to theformer, in case several systems of low-pressure cylinders are used, forthe purpose described.

6. A rotary engine provided with a rotatably-journaled driving-wheel ordriving-drum 7 in jointed connection with a cylindrical center piece 9eccentrically located within said driving-wheel and rotatably journaledaround a tubular plug-valve 8 which is eccentrically secured to a pipe 4screwed into a valve-chamber 5 and in which plug 8 are located diametralholes for the admission of steam into and discharging it from radialhigh-pressure cylinders 29 in the cylindrical center piece 9; incombination with two expansion-valves 43, 44 sunk into the tubular plug8 flush with its outside surface at each of the diametral holes 25leading to the highpressure cylinders 29, said valves 43, 44 beingarranged to be shifted longitudinally in relation to the plug 8 by meansof rods 45, 46 attached to them and likewise sunk into the plug 8, flushwith it, and continuing through the pipe 4 on which the plug 8 ismounted and out through the valve-chamber 5 on the outside of which theyare provided with handles 47, 48, and the valves 43, 44 moreover beingprovided with semicircular recesses 49 arranged so as to leave the hole25 fully open when the valve is pushed clear in, while said hole becomes.half closed when the valve is fully withdrawn, for the purposespecified.

7. A rotary engine provided with a rotatably-journaled driving-wheel ordriving-drum 7 in jointed connection with a cylindrical center piece 9eccentrically located within said driving-wheel and rotatably j ournaledaround a tubular plug-valve 8 which is eccentrically secured to a pipe 4screwed into a valvechamber 5 and in which plug 8 are located diametralholes for the admission of steam into and discharging it from radialhigh-pressure cylinders 29 and low-pressure cylinders 37 in thecylindrical center piece 9; in combination with two expansion-valves 43,44 sunk into the tubular plug 8 flush with its outside surface at eachof the diametral holes 25 leading to the high-pressure cylinders 29 saidvalves 43, 44 being arranged to be shifted longitudinally in relation tothe plug 8 by means of rods 45,46 attached to them and likewise sunkinto the plug 8,flush with it, and continuing through the pipe 4 onwhich the plug 8 is mounted and out through the valve-chamber 5 on theoutside of which they are provided with handles 47,48, and the valves43, 44 moreover being provided with semicircular recesses 49 arranged soas to leave the hole 25 fully open when the valve is pushed clear in,while said hole becomes half closed when the valve is fully withdrawn,for the purpose specified.

8. A rotary steam-engine provided with a rotatably-journaleddriving-wheel or drivingdrum 7 in jointed connection with a cylindricalcenter piece 9 eccentrically located within said driving-wheel; incombination with pins which may or may not be surrounded by rollers andwhich pins are located along the periphery at the two sides of thecylindrical center piece 9 on rings 41 removably secured to the centerpiece 9, the pitch or distance apartof said pins 40 being equal to thediameter of the pin, and other corresponding pins 67 similarly arrangedin the driving-Wheel or driving-drum 7, for the purpose specified.

9. A rotary steam-engine provided with a rotatably-journaleddriving-Wheel or drivingdrum 7 in jointed connection with a cylindricalcenter piece 9 eccentrically located within said driving-wheel androtatably journaled around a tubular plug-valve 8 which is attached to apipe 4 carried through a pedestal 2 on the engine-frame; in combinationwith a tubular hub 13 screwed into the driving-wheel 7 andconcentrically surrounding the pipe 4 so as to leave an intermediatespace 14 between through which the interior of the driving-wheelcommunicates partly with a passage 42 for waste steam and partly with anoil-cellar 58 for consumed oil, the said communication being broughtabout by means of a smaller passage 59 between the oil-cellar 58 and theintermediate space 14, for the purpose specified.

10. A rotary steam-engine provided with a rotatably-jou rnaleddriving-wheel or drivingdrum 7 in jointed connection with a cylindricalcenter piece 9 eccentrically located within said driving-wheel androtatably journaled around a tubular plug-valve 8; in combination with apin 11 on the end of the plug 8, which pin rotatably enters inacorrespondingly-bored hole in the center of the drivingwheel shaft 12and has a lubricating-passage passing through it, for the purposespecified.

11. A rotary steam-engine provided with a rotatably-journaleddriving-wheel or drivingdrum 7 in jointed connection with a cylindricalcenter piece 9 eccentrically located Within said driving-wheel androtatably journaled around a tubular plug-valve 8 provided with a pin 11havinga lubricating-passage through it and entering rotatably in thecenter of the driving-wheel shaft 12, and which tubular plug 8 iseccentrically secured to a pipe 4 and provided with diametral admissionand exhaust passages 25 and 33 for steamcylinders 29, 37 arrangedradially in the center piece 9 and provided with pistons 30, 38 andconnecting-rods 31, 39 in combination with lubricating passages 54, 61arranged partly in the pipe 4 with its eccentrically-secn red plug 8 andpartly in the center of each cylinder piston 30, 38, of which passagesthose 54 located in the pipe 4 and plug 8 terminate opposite thediametral holes 25, 33 of the latter, leading to the steam-cylinders 29,37, one of said passages 54 moreover continuing toward the end of theplug 8 and there terminating inward in the latter and communicating withthe lubricating-passage 55 in the pin 11 of the plug, while in each ofthe passages 61 at the center of the pistons is located a valve 62jointed to a lever 63 fulcrumed at the middle and actuated by a spring64 causing the valve to open when the piston comes close to the bottomof the cylinder, for the purpose specified.

In testimony that I claim the foregoing as my invention I have signed myname in presence of two subscribing Witnesses.

MATHIAS J ONSSON.

Witnesses:

SIGNE WETTER, EVALD LUNDGREN.

